JPS59199937A - Construction of reinforce concrete building - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Conventionally, various methods have been proposed for prefabricated reinforced concrete frames, but in buildings with large member stresses such as high-rise buildings and buildings with large spans, steel frame reinforced concrete construction may be used. 1.1 However, since steel-framed reinforced concrete structures require the joining of two types of steel, the steel frame and reinforcing bars, it has been difficult to convert each member into pre-knobs.

The present invention has been proposed in view of the above-mentioned circumstances, and includes a beam top end cutout in which each end of the beam bottom reinforcement and the steel frame protrudes from the beam end face, and the top end of the reinforcing bar is cut out by the thickness of the slab. After fixing the protruding end of the steel frame to the steel frame 7 langes of the cast-in-place steel reinforced concrete column, the L-shaped joint reinforcing bars are passed through the web of the column steel frame perpendicular to the beam. The beam is fastened to the protruding end of the lower end reinforcement of the beam, and then, after setting the PC floor plate, the upper beam reinforcement and column reinforcement are arranged, and concrete is poured on the cutout surfaces of the upper ends of the columns and the beams. The purpose of this method is to construct a steel-framed reinforced concrete structure that can improve on-site workability without sacrificing structural performance by converting a part of the steel-framed reinforced concrete structure into a pre-knob. The purpose of this invention is to provide an improved construction method.

In the present invention, a precast steel reinforced concrete beam is used in which each end of the beam bottom reinforcement and the steel frame protrudes from the beam end surface, and the top end of the reinforcing bar protrudes from the beam top end cutout surface cut out by the thickness of the slab. Since the beam is carried into a predetermined position and the steel frame end protruding from the beam end face is fixed to the flange surface of the cast-in-place steel reinforced concrete column, the beam steel frame and the column steel frame are easily and reliably joined. Furthermore, in the present invention, the L-shaped joint reinforcement passes through the web of the column steel frame perpendicular to the beam and is connected to the beam bottom reinforcement that protrudes from the beam end surface, so that the S beam bottom reinforcement is firmly anchored to the column steel frame. will be done.

In the present invention, after the steel frame of the cast-in-place steel reinforced concrete column and the precast steel reinforced concrete beam are connected and the PC floor slab is set, the upper end reinforcement of the beam and the reinforcement of the column are arranged, and the column and Since concrete was placed on the cut surface of the upper end of the beam, the lower end reinforcement of the beam was anchored to the concrete part of the steel reinforced concrete column via the L-shaped joint reinforcing bar connected to the protruding end, and the beam The upper end reinforcement of the beam, the upper end of the cost reinforcement, and the floor plate mounted on the beam are integrally joined through the poured concrete at the upper end, and the joint is made strong as a whole to create a steel-framed reinforced concrete frame. It is composed of

In this way, according to the present invention, a part of a steel reinforced concrete structure can be prefabricated without impairing structural performance.
This mainly eliminates formwork and supports for horizontal members, improving workability on site.

The present invention will be described below with reference to the illustrated embodiments.

(6) is a precast steel reinforced concrete beam in which the ends of the steel frame (1) and the beam bottom reinforcement (2) built into the beam protrude from the longitudinal end face of the beam by approximately equal lengths. Moreover, the upper end of the rib (3) protrudes from the cutout surface of the upper end, which is approximately slender.

(b) is a cast-in-place steel reinforced concrete column;
- the web parts (4) of the twin H-sections are arranged perpendicularly to each other;

Then, the beam (4) is installed in a predetermined position, and the protruding end of the beam steel frame (1) in the beam (■) is attached to the 72nd inch part (5) of the front n5 sister bone column 0 by high-tensile bolts, welding, etc. Fix it using the following method.

After attaching the steel beam (1) to the steel column (C), insert the L-shaped connecting reinforcing bar (6) into the web (4) of the steel column (C) orthogonal to the steel beam (1). Lower end reinforcing bar (1) of beam (6)
) of the steel column by welding, pressure welding, / threaded joints, or other known means, and anchoring the lower end reinforcement (1) to the steel column ().

Next, a precast concrete floor plate (Q) is placed on the beam (5), and reinforcement is placed through the beam top end reinforcement (7), and the column main reinforcement (8) is placed.

When the above reinforcement work is completed, the column concrete') -) (9)
and concrete in the slab thickness area at the top of the beam (8))
(10) is poured to integrate the columns, beams, and floorboards.

The above steps are then repeated to construct a steel reinforced concrete structure.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

Fig. 1 is a front view showing the column-beam joint of a steel reinforced concrete structure constructed by the method of the present invention, Fig. 2 is a plan view thereof, and Fig. 3 is a view taken from arrow 1-1 in Fig. 2; FIG. 4 is a longitudinal sectional view showing the joint between the beam and the floor plate, and FIGS. 5 and 6 are longitudinal sectional drawings and slope views of the precast steel reinforced concrete beam, respectively. (6)...Precast steel reinforced concrete beam, (
C)...Steel frame column, (1)...Steel beam beam, (2)...
Beam bottom reinforcement, (3)... cost reinforcement, (4)... web, (
6)... L roof joint reinforcement, (7)... Beam top end reinforcement, (8
)...Column main reinforcement, (9) Ql)...Concrete agent, patent attorney, 2 people outside of the Kaihon Important Literature, Figure 1, Figure 30, Figure 40

Claims (1)

[Claims] Each end of the beam bottom reinforcement and steel frame protrudes from the beam end face, and the steel frame protruding end of the precast steel reinforced concrete beam is cast in place, with the top end of the reinforcing bar protruding from the beam top cutout surface cut out by the thickness of the slab. After it is fixed to the steel frame flange of the steel reinforced concrete column, the L-shaped joint reinforcing bar is passed through the web of the column steel frame perpendicular to the beam and fastened to the protruding end of the beam bottom end reinforcement, and then the PC floor plate is set, and then the beam is attached to the upper beam. A method for constructing a steel-framed reinforced concrete structure, comprising arranging reinforcements and column reinforcements and pouring concrete onto the cutout surfaces of the upper ends of the columns and beams.